<table>
  <tr>
    <td>Data Inicial</td>
    <td><input id ="dataini" onkeypress ="mascara(this,data)" onblur = "mascara(this,validaDat)" size ="10" maxlength ="10"></td>
  </tr>
  <tr>
    <td>Data Final</td>
    <td><input id ="datafim" onkeypress ="mascara(this,data)" onblur = "mascara(this,validaDat)" size ="10" maxlength ="10"></td>
  </tr>
</table>
<div id ="dados"></div>
<hr>
  <div id ="botoes" class ="fltrt">
  <button type = 'button' onclick = 'enviar()'>Buscar</button>
  <button type = 'button' onclick = 'retornar()'>Cancelar</button>
</div><br class ="clearfloat">
